All equal sets are _____ .
null
singleton
disjoint
equivalent
If A = {Quadrilaterals} and B = {Rectangles}, then set A and set B are
If A = {5, 6, 7, 8, 9, 10} and B = {4, 6, 8, 10, 12} then set A and set B are
If A = {1, 3, 7, 8} and B = {2, 4, 6}, then A and B are ______ .